With the extension, you can set Tax Rates that are automatically calculated into the price of items in your cart. You can set the Tax Rate, as a percentage value, or disable the option in its entirety.

If you are catering for a singular market, that use a single tax rate, then this feature will be very useful for you.

Moreover, Shipping follows a similar system, with the ability to add Flat Rate, Quantity Rate or Percent Shipping to the total price of a product. There are various options from enabling shipping in altogether to the cost calculation methods, all at Admin → Components → RokQuickCart → Parameters